Error flag

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1 total messages Started by EDMONDS Fri, 15 Jul 1988 13:47

#2137

Author: EDMONDS
Date: Fri, 15 Jul 1988 13:47

20 lines
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In response to the question:

>Our impression is that the error pin on a transputer stays set even after
>the processor has been reset, and does not clear until code is loaded -
>is this really the way it works??

The error pin is directly connected to the processor's error flag. If it
is high then an error, e.g. arithmetic overflow, divide by zero, array bounds 
violation or software setting of the flag has been detected. Once set, the 
flag can only be cleared by the "testerr" instruction and IS NOT cleared by 
a reset. This is so analysis can detect which processor caused the error.

Hope this clears up a few points.


Mark Edmonds
UK.AC.RHBNC.PHV1

P.S.   Does anyone know when the T801 (optimised for static RAMS) will 
       materialise?

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